2nd Grade Addition Worksheets (2-Digit, Regrouping)
Free printable second-grade addition worksheets with answer keys — two-digit addition with and without regrouping within 100, plus a single-digit facts warm-up, three-digit sums, and word problems. Fresh randomized PDF every time, no signup.
Aligned to CCSS 2.NBT.5 · Add within 100 with regrouping
Practices CCSS 2.NBT.5
Addition — 2-Digit Within 100
Aligned to CCSS 2.NBT.5
Name: ___________________________ Date: _____________
More 2nd Grade Worksheets
How to Use This Worksheet
- Pick a worksheet type. The four types follow the order second graders actually learn addition: single-digit facts to 20, two-digit within 100, three-digit within 1000, and word problems.
- On 2-digit within 100, set Regrouping to without regrouping while the place-value setup is new, then with regrouping to drill carrying, and finally mixed practice — mixing the two is what forces students to decide whether to carry.
- Choose stacked (column) for carrying practice or horizontal for mental math. Word problems always print one per row with space to show work.
- Tick Include answer key to print a second page with the answers, then click Download PDF. Every click of Generate New makes a fresh randomized sheet, so the same settings never produce the same worksheet twice.
Addition with Regrouping Worksheets
Regrouping (carrying) is the heart of second-grade addition: when the ones column reaches 10 or more, students carry a ten into the tens column — like 47 + 38, where 7 + 8 = 15 means writing the 5 and carrying 1. Choose 2-digit within 100, set Regrouping to with regrouping, and keep the stacked (column) layout to get vertical problems where every one of them requires a carry. Children still mastering sums to 20 can warm up on our first grade addition worksheets first (CCSS 1.OA.6).
Two-Digit Addition Without Regrouping
Not every two-digit problem needs carrying. Sums like 32 + 45 stay under 10 in each column, letting students practice the place-value setup before they tackle the harder carries. Set Regrouping to without regrouping for a full sheet of these, switch to the horizontal layout for mental-math drills, or build number sense with a printable number line. Once addition feels solid, many classrooms move on to fractions worksheets.
Addition Word Problems
CCSS 2.OA.1 asks second graders to use addition to solve one- and two-step word problems within 100 — not just to compute, but to work out which operation the story calls for. The Addition word problems type prints one-step add-to and put-together stories with room to show work and a ruled answer line. Four to eight problems is a realistic sitting; pair them with a stacked computation sheet so the arithmetic stays fresh while the reading gets harder.
How to Teach Second Grade Addition
Build from concrete to abstract: start with base-ten blocks or a ten-frame so carrying is something kids can see, then move to the written column method. Keep sessions short — a dozen problems a few times a week beats one long sheet — and have students estimate first (47 + 38 is “about 50 + 40 = 90”) so wrong answers stand out. Mix in addition facts to 20 for fluency, and only introduce three-digit sums once two-digit regrouping is automatic (CCSS 2.NBT.5 → 2.NBT.7).
FAQ
What addition do 2nd graders learn?
Second grade addition centers on adding within 100 — including two-digit problems that require regrouping (carrying), such as 47 + 38 = 85. This is the core standard CCSS 2.NBT.5. Students also keep building fluency with addition facts within 20 (2.OA.2) and begin adding three-digit numbers within 1,000 (2.NBT.7).
What is regrouping (carrying) in addition?
Regrouping happens when the ones column adds up to 10 or more, so you “carry” a ten into the tens column — for example 47 + 38: 7 + 8 = 15, write the 5 and carry 1 ten. The stacked (column) layout on this generator lines the digits up vertically so children can practice carrying step by step.
Are these worksheets really free?
Yes — every worksheet on Printable Polly is 100% free with no signup, no account, and no download limit. Pick your number range and layout, click Download PDF, and print as many fresh worksheets as you want.
Should I start with 2-digit or 3-digit addition?
Most second graders spend the bulk of the year on two-digit addition within 100, mastering regrouping before moving on. Start with “2-Digit Within 100” set to “without regrouping,” switch it to “with regrouping” once the place-value setup is comfortable, and use “3-Digit Within 1000” only after two-digit carrying feels automatic.
How do I help a child stuck on addition word problems?
Have them underline the question, circle the two numbers, and say out loud whether the story is joining two groups or adding more to one group — both mean addition. Then write the equation before computing. Choosing “Addition word problems” gives one-step problems within 100, which is exactly what CCSS 2.OA.1 asks for.